Three choices, buy adapter mounts, use a front motor plate or elephant ears or find a V8 K member and swap the original out I'm in the middle of aquiring parts to remove the six cylinder K member from my 1966 Coronet Deluxe and put in a V8 K member in it so I can use stock OEM mounts and headers for a 440 I've done the front motor plate and elephant ears before that, I have NOT done the adapter mounts because of the problems I've heard from other Mopar guys that did use them having to use special headers and so on Investigate and then decide, think twice or more and then act once